﻿//--------------------------------------------------------------------------------------
// File: DDSTextureLoader.h
//
// Functions for loading a DDS texture and creating a Direct3D 11 runtime resource for it
//
// Note these functions are useful as a light-weight runtime loader for DDS files. For
// a full-featured DDS file reader, writer, and texture processing pipeline see
// the 'Texconv' sample and the 'DirectXTex' library.
//
// THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF
// ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO
// THE IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A
// PARTICULAR PURPOSE.
//
// Copyright (c) Microsoft Corporation. All rights reserved.
//
// http://go.microsoft.com/fwlink/?LinkId=248926
// http://go.microsoft.com/fwlink/?LinkId=248929
//--------------------------------------------------------------------------------------

#ifdef _MSC_VER
#pragma once
#endif

#if defined(_XBOX_ONE) && defined(_TITLE) && MONOLITHIC
#include <d3d11_x.h>
#else
#include <d3d11.h>
#include <d3d9.h>
#endif

#pragma warning(push)
#pragma warning(disable : 4005)
#include <stdint.h>
#pragma warning(pop)

#include <assert.h>
#include <memory>
#include <stdio.h>
#include <stdlib.h>
#include <windows.h>

#if (_MSC_VER >= 1800)
#include <algorithm>
#endif

#if (defined(_MSC_VER) && (_MSC_VER < 1610) && !defined(_In_reads_)) || defined(__GNUC__)
#define _In_reads_(exp)
#define _Out_writes_(exp)
#define _In_reads_bytes_(exp)
#define _In_reads_opt_(exp)
#define _Outptr_opt_
#endif
#ifdef __GNUC__
#define _Out_opt_
#endif

namespace EffekseerDirectX
{
enum DDS_ALPHA_MODE
{
	DDS_ALPHA_MODE_UNKNOWN = 0,
	DDS_ALPHA_MODE_STRAIGHT = 1,
	DDS_ALPHA_MODE_PREMULTIPLIED = 2,
	DDS_ALPHA_MODE_OPAQUE = 3,
	DDS_ALPHA_MODE_CUSTOM = 4,
};

// Standard version
HRESULT CreateDDSTextureFromMemory(_In_ ID3D11Device* d3dDevice,
								   _In_reads_bytes_(ddsDataSize) const uint8_t* ddsData,
								   _In_ size_t ddsDataSize,
								   _Outptr_opt_ ID3D11Resource** texture,
								   _Outptr_opt_ ID3D11ShaderResourceView** textureView,
								   _In_ size_t maxsize = 0,
								   _Out_opt_ DDS_ALPHA_MODE* alphaMode = nullptr);

// Standard version with optional auto-gen mipmap support
HRESULT CreateDDSTextureFromMemory(_In_ ID3D11Device* d3dDevice,
								   _In_opt_ ID3D11DeviceContext* d3dContext,
								   _In_reads_bytes_(ddsDataSize) const uint8_t* ddsData,
								   _In_ size_t ddsDataSize,
								   _Outptr_opt_ ID3D11Resource** texture,
								   _Outptr_opt_ ID3D11ShaderResourceView** textureView,
								   _In_ size_t maxsize = 0,
								   _Out_opt_ DDS_ALPHA_MODE* alphaMode = nullptr);

// Extended version
HRESULT CreateDDSTextureFromMemoryEx(_In_ ID3D11Device* d3dDevice,
									 _In_reads_bytes_(ddsDataSize) const uint8_t* ddsData,
									 _In_ size_t ddsDataSize,
									 _In_ size_t maxsize,
									 _In_ D3D11_USAGE usage,
									 _In_ unsigned int bindFlags,
									 _In_ unsigned int cpuAccessFlags,
									 _In_ unsigned int miscFlags,
									 _In_ bool forceSRGB,
									 _Outptr_opt_ ID3D11Resource** texture,
									 _Outptr_opt_ ID3D11ShaderResourceView** textureView,
									 _Out_opt_ DDS_ALPHA_MODE* alphaMode = nullptr);

// Extended version with optional auto-gen mipmap support
HRESULT CreateDDSTextureFromMemoryEx(_In_ ID3D11Device* d3dDevice,
									 _In_opt_ ID3D11DeviceContext* d3dContext,
									 _In_reads_bytes_(ddsDataSize) const uint8_t* ddsData,
									 _In_ size_t ddsDataSize,
									 _In_ size_t maxsize,
									 _In_ D3D11_USAGE usage,
									 _In_ unsigned int bindFlags,
									 _In_ unsigned int cpuAccessFlags,
									 _In_ unsigned int miscFlags,
									 _In_ bool forceSRGB,
									 _Outptr_opt_ ID3D11Resource** texture,
									 _Outptr_opt_ ID3D11ShaderResourceView** textureView,
									 _Out_opt_ DDS_ALPHA_MODE* alphaMode = nullptr);

HRESULT CreateDDSTextureFromMemory(LPDIRECT3DDEVICE9 device,
								   _In_reads_bytes_(ddsDataSize) const uint8_t* ddsData,
								   _In_ size_t ddsDataSize,
								   LPDIRECT3DTEXTURE9& texture);
} // namespace EffekseerDirectX
